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| author | Rik van Riel <riel@redhat.com> | 2008-11-19 15:36:44 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-11-19 18:49:59 -0800 |
| commit | 00d8089c54867053a5aae062b765f257ca419e27 (patch) | |
| tree | a976481b5d503fde553b8816edb01f310f3a505a /mm/vmscan.c | |
| parent | 8e324c19f57cc05922e9cc0f338b58108da45539 (diff) | |
| download | lwn-00d8089c54867053a5aae062b765f257ca419e27.tar.gz lwn-00d8089c54867053a5aae062b765f257ca419e27.zip | |
vmscan: fix get_scan_ratio() comment
Fix the old comment on the scan ratio calculations.
Signed-off-by: Rik van Riel <riel@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmscan.c')
| -rw-r--r-- | mm/vmscan.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/mm/vmscan.c b/mm/vmscan.c index f83a7ed5c6c4..7ea1440b53db 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -1389,9 +1389,9 @@ static void get_scan_ratio(struct zone *zone, struct scan_control *sc, file_prio = 200 - sc->swappiness; /* - * anon recent_rotated[0] - * %anon = 100 * ----------- / ----------------- * IO cost - * anon + file rotate_sum + * The amount of pressure on anon vs file pages is inversely + * proportional to the fraction of recently scanned pages on + * each list that were recently referenced and in active use. */ ap = (anon_prio + 1) * (zone->recent_scanned[0] + 1); ap /= zone->recent_rotated[0] + 1; |